On Sep 24, 2015, at 10:34 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
On 09/24/2015 09:58 PM, Herbert Xu wrote:
On Thu, Sep 24, 2015 at 09:36:53PM -0700, Guenter Roeck wrote:I assume this is on top of mainline ?
might explain your problem.
I thought this was resolved in 4.1, but it looks like the problem still persists
there. At least I have reports from my workplace that 4.1.6 and 4.1.7 are still
affected. I don't know if there have been any relevant changes in 4.2.
Copying Herbert and Eric for additional input.
There was a separate bug discovered by Tejun recently. You need
to apply the patches
There is another follow-up but it shouldn't make any difference
Any idea what may be needed for 4.1 ?
I am currently trying https://patchwork.ozlabs.org/patch/473041/,
but I have no idea if that will help with the problem we are seeing there.
Thank you for the patches to try, I'll build a kernel with them early next week
and report back. It sounds like it may not match my problem exactly so we'll
In the meantime, I also observed the following oops:
[ 1709.620092] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
[ 1709.624058] BUG: unable to handle kernel paging request at ffffea001dbef3c0
[ 1709.624058] IP: [<ffffea001dbef3c0>] 0xffffea001dbef3c0
[ 1709.624058] PGD 78f7dc067 PUD 78f7db067 PMD 800000078ec001e3
[ 1709.624058] Oops: 0011 [#1] SMP
[ 1709.624058] Modules linked in: i2c_piix4(E) btrfs(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) aesni_intel(E) aes_x86_64(E) lrw(E) gf128mul(E) glue_helper(E) ablk_helper(E) cryptd(E) floppy(E)
[ 1709.624058] CPU: 4 PID: 19714 Comm: pf_dump Tainted: G E 4.0.4 #1